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//===-- SPIRVSubtarget.cpp - SPIR-V Subtarget Information ------*- C++ -*--===//
//
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
// See https://llvm.org/LICENSE.txt for license information.
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
//
//===----------------------------------------------------------------------===//
//
// This file implements the SPIR-V specific subclass of TargetSubtargetInfo.
//
//===----------------------------------------------------------------------===//
#include "SPIRVSubtarget.h"
#include "SPIRV.h"
#include "SPIRVCommandLine.h"
#include "SPIRVGlobalRegistry.h"
#include "SPIRVLegalizerInfo.h"
#include "SPIRVRegisterBankInfo.h"
#include "SPIRVTargetMachine.h"
#include "llvm/MC/TargetRegistry.h"
#include "llvm/TargetParser/Host.h"
using namespace llvm;
#define DEBUG_TYPE "spirv-subtarget"
#define GET_SUBTARGETINFO_TARGET_DESC
#define GET_SUBTARGETINFO_CTOR
#include "SPIRVGenSubtargetInfo.inc"
static cl::opt<bool>
SPVTranslatorCompat("translator-compatibility-mode",
cl::desc("SPIR-V Translator compatibility mode"),
cl::Optional, cl::init(false));
static cl::opt<std::set<SPIRV::Extension::Extension>, false,
SPIRVExtensionsParser>
Extensions("spirv-ext",
cl::desc("Specify list of enabled SPIR-V extensions"));
// Compare version numbers, but allow 0 to mean unspecified.
static bool isAtLeastVer(VersionTuple Target, VersionTuple VerToCompareTo) {
return Target.empty() || Target >= VerToCompareTo;
}
SPIRVSubtarget::SPIRVSubtarget(const Triple &TT, const std::string &CPU,
const std::string &FS,
const SPIRVTargetMachine &TM)
: SPIRVGenSubtargetInfo(TT, CPU, /*TuneCPU=*/CPU, FS),
PointerSize(TM.getPointerSizeInBits(/* AS= */ 0)), InstrInfo(),
FrameLowering(initSubtargetDependencies(CPU, FS)), TLInfo(TM, *this),
TargetTriple(TT) {
switch (TT.getSubArch()) {
case Triple::SPIRVSubArch_v10:
SPIRVVersion = VersionTuple(1, 0);
break;
case Triple::SPIRVSubArch_v11:
SPIRVVersion = VersionTuple(1, 1);
break;
case Triple::SPIRVSubArch_v12:
SPIRVVersion = VersionTuple(1, 2);
break;
case Triple::SPIRVSubArch_v13:
SPIRVVersion = VersionTuple(1, 3);
break;
case Triple::SPIRVSubArch_v14:
default:
SPIRVVersion = VersionTuple(1, 4);
break;
case Triple::SPIRVSubArch_v15:
SPIRVVersion = VersionTuple(1, 5);
break;
case Triple::SPIRVSubArch_v16:
SPIRVVersion = VersionTuple(1, 6);
break;
}
OpenCLVersion = VersionTuple(2, 2);
// The order of initialization is important.
initAvailableExtensions();
initAvailableExtInstSets();
GR = std::make_unique<SPIRVGlobalRegistry>(PointerSize);
CallLoweringInfo = std::make_unique<SPIRVCallLowering>(TLInfo, GR.get());
InlineAsmInfo = std::make_unique<SPIRVInlineAsmLowering>(TLInfo);
Legalizer = std::make_unique<SPIRVLegalizerInfo>(*this);
RegBankInfo = std::make_unique<SPIRVRegisterBankInfo>();
InstSelector.reset(
createSPIRVInstructionSelector(TM, *this, *RegBankInfo.get()));
}
SPIRVSubtarget &SPIRVSubtarget::initSubtargetDependencies(StringRef CPU,
StringRef FS) {
ParseSubtargetFeatures(CPU, /*TuneCPU=*/CPU, FS);
return *this;
}
bool SPIRVSubtarget::canUseExtension(SPIRV::Extension::Extension E) const {
return AvailableExtensions.contains(E);
}
bool SPIRVSubtarget::canUseExtInstSet(
SPIRV::InstructionSet::InstructionSet E) const {
return AvailableExtInstSets.contains(E);
}
bool SPIRVSubtarget::isAtLeastSPIRVVer(VersionTuple VerToCompareTo) const {
return isAtLeastVer(SPIRVVersion, VerToCompareTo);
}
bool SPIRVSubtarget::isAtLeastOpenCLVer(VersionTuple VerToCompareTo) const {
if (!isOpenCLEnv())
return false;
return isAtLeastVer(OpenCLVersion, VerToCompareTo);
}
// If the SPIR-V version is >= 1.4 we can call OpPtrEqual and OpPtrNotEqual.
// In SPIR-V Translator compatibility mode this feature is not available.
bool SPIRVSubtarget::canDirectlyComparePointers() const {
return !SPVTranslatorCompat && isAtLeastVer(SPIRVVersion, VersionTuple(1, 4));
}
void SPIRVSubtarget::initAvailableExtensions() {
AvailableExtensions.clear();
if (!isOpenCLEnv())
return;
AvailableExtensions.insert(Extensions.begin(), Extensions.end());
}
// TODO: use command line args for this rather than just defaults.
// Must have called initAvailableExtensions first.
void SPIRVSubtarget::initAvailableExtInstSets() {
AvailableExtInstSets.clear();
if (!isOpenCLEnv())
AvailableExtInstSets.insert(SPIRV::InstructionSet::GLSL_std_450);
else
AvailableExtInstSets.insert(SPIRV::InstructionSet::OpenCL_std);
// Handle extended instruction sets from extensions.
if (canUseExtension(
SPIRV::Extension::SPV_AMD_shader_trinary_minmax_extension)) {
AvailableExtInstSets.insert(
SPIRV::InstructionSet::SPV_AMD_shader_trinary_minmax);
}
}
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